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MS51960-79
Flat Countersunk Head Machine Screw
Description
Fastener Length: 5/16", Thread: 1/4-28, Thread Length: 7/32"
Specifications
| Countersink Angle | 82.0 degrees |
|---|---|
| Fastener Length | 0.280 inches minimum and 0.312 inches maximum |
| Finish | Passivate per QQ-P-35 |
| Head Diameter | 0.452 inches minimum and 0.507 inches maximum |
| Head Height | 0.092 inches minimum and 0.107 inches maximum |
| Head Style | Flat countersunk undercut, Phillips Flat Head |
| Internal Drive Style | Cross recess type 1 |
| Length | 5/16 |
| Material | CRES |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Nondefinitive Specification/Std Data | 3 type and 2c style |
| Screw Material | Steel comp 304 or steel comp 301 |
| Screw Material Specification | Qq-s-763 fed spec 1st material response or fed std 66 fed spec 2nd material response |
| Screw Surface Treatment | Passivate |
| Screw Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Size | 1/4-28 |
| Thread Class | 2a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Fraction | 1/4-28 |
| Thread Length | 0.102 inches minimum and 0.220 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Thread Type | N.F. - Fine, UNC-2A |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS51960-79. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error